package com.yupi.yupicturebackend.service.impl;

import cn.hutool.core.collection.CollUtil;
import cn.hutool.core.util.ObjUtil;
import cn.hutool.core.util.StrUtil;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.yupi.yupicturebackend.constant.UserConstant;
import com.yupi.yupicturebackend.exception.BusinessException;
import com.yupi.yupicturebackend.exception.ErrorCode;
import com.yupi.yupicturebackend.manager.auth.StpKit;
import com.yupi.yupicturebackend.model.dto.user.UserQueryRequest;
import com.yupi.yupicturebackend.model.entity.User;
import com.yupi.yupicturebackend.model.enums.UserRoleEnum;
import com.yupi.yupicturebackend.model.vo.LoginUserVO;
import com.yupi.yupicturebackend.model.vo.UserVO;
import com.yupi.yupicturebackend.service.UserService;
import com.yupi.yupicturebackend.mapper.UserMapper;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;
import org.yaml.snakeyaml.events.Event;

import javax.servlet.http.HttpServletRequest;
import java.util.ArrayList;
import java.util.List;
import java.util.stream.Collectors;

/**
* @author 23131
* @description 针对表【user(用户)】的数据库操作Service实现
* @createDate 2025-04-23 23:21:53
*/
@Service
public class UserServiceImpl extends ServiceImpl<UserMapper, User>
    implements UserService {

    @Autowired
    private UserMapper userMapper;






    //校验

    /**
     * 用户注册
     * @param userAccount
     * @param userPassword
     * @param checkPassword
     * @return
     */
    @Override
    public long UserRegister(String userAccount, String userPassword, String checkPassword) {
        if( StrUtil.hasBlank(userAccount, userPassword, checkPassword)){
            throw new BusinessException(ErrorCode.PARAMS_ERROR,"参数为空");
        }
        if(userAccount.length()<4){
            throw new BusinessException(ErrorCode.PARAMS_ERROR,"用户名长度过短");
        }
        if(userPassword.length()<8){
            throw new BusinessException(ErrorCode.PARAMS_ERROR,"密码长度过短");
        }
        if(!userPassword.equals(checkPassword)){
            throw new BusinessException(ErrorCode.PARAMS_ERROR,"两次密码输入不一致");
        }
        //是否已注册
        QueryWrapper<User> queryWrapper = new QueryWrapper<>();
        queryWrapper.eq("UserAccount",userAccount);
        long count = this.baseMapper.selectCount(queryWrapper);
        if(count >0){
            throw new BusinessException(ErrorCode.PARAMS_ERROR,"账号已注册");
        }
        // 密码加密
        String encryptPassword = getEncryptPassword(userPassword);
        User user = new User();
        user.setUserAccount(userAccount);
        user.setUserPassword(encryptPassword);
        user.setUserName("wuming");
        user.setUserRole(UserRoleEnum.USER.getValue());
        boolean save = this.save(user);
        if(!save){
            throw new BusinessException(ErrorCode.SYSTEM_ERROR,"注册失败，数据库错误");
        }
        return user.getId();

    }

    /**
     * 密码加盐加密
     * @param userPassword
     * @return
     */
    @Override
    public String getEncryptPassword(String userPassword){

        final String SALT="xll";
        String md5DigestAsHex = DigestUtils.md5DigestAsHex((SALT + userPassword).getBytes());
        return md5DigestAsHex;
    }


    /**
     * 用户登录
     * @param userAccount
     * @param userPassword
     * @param request
     * @return
     */
    @Override
    public LoginUserVO userLogin(String userAccount, String userPassword, HttpServletRequest request) {
        if( StrUtil.hasBlank(userAccount, userPassword)){
            throw new BusinessException(ErrorCode.PARAMS_ERROR,"参数为空");
        }
        if(userAccount.length()<4){
            throw new BusinessException(ErrorCode.PARAMS_ERROR,"用户名错误");
        }
        if(userPassword.length()<8){
            throw new BusinessException(ErrorCode.PARAMS_ERROR,"密码错误");
        }
        String encryptPassword = getEncryptPassword(userPassword);
        //
        QueryWrapper<User> queryWrapper = new QueryWrapper<>();
        queryWrapper.eq("UserAccount",userAccount);
        queryWrapper.eq("UserPassword",encryptPassword);
        User user = this.baseMapper.selectOne(queryWrapper);
        if(user==null){
            throw new BusinessException(ErrorCode.PARAMS_ERROR,"用户名不存在或者密码错误");
        }
        //todo
        request.getSession().setAttribute(UserConstant.USER_LOGIN_STATE,user);
        //记录用户登录态到sa-Token 便于空间鉴权时使用
        StpKit.SPACE.login(user.getId());
        StpKit.SPACE.getSession().set(UserConstant.USER_LOGIN_STATE,user);
        return this.getLoginUserVO(user);
    }



    @Override
    public LoginUserVO getLoginUserVO(User user) {
        if (user == null) {
            return null;
        }
        LoginUserVO loginUserVO = new LoginUserVO();
        BeanUtils.copyProperties(user, loginUserVO);
        return loginUserVO;
    }



    /**
     * 获取当前登录用户
     * @param request
     * @return
     */

    @Override
    public User getLoginUser(HttpServletRequest request) {
        // 先判断是否已登录
        Object userObj = request.getSession().getAttribute(UserConstant.USER_LOGIN_STATE);
        User currentUser = (User) userObj;
        if (currentUser == null || currentUser.getId() == null) {
            throw new BusinessException(ErrorCode.NOT_LOGIN_ERROR);
        }
        // 从数据库查询（追求性能的话可以注释，直接返回上述结果）
        long userId = currentUser.getId();
        currentUser = this.getById(userId);
        if (currentUser == null) {
            throw new BusinessException(ErrorCode.NOT_LOGIN_ERROR);
        }
        return currentUser;
    }



/*    @Override
    public User getLoginUser(HttpServletRequest request) {
        User currentUser = (User) request.getSession().getAttribute(UserConstant.USER_LOGIN_STATE);
        if(currentUser==null || currentUser.getId()==null){
            throw new BusinessException(ErrorCode.NOT_LOGIN_ERROR);
        }

        Long userId = currentUser.getId();
        currentUser = this.getById(userId);
        if(currentUser==null){
            throw new BusinessException(ErrorCode.NOT_LOGIN_ERROR);
        }
        return currentUser;
    }*/

    /**
     * 用户登录注销
     * @param request
     * @return
     */
    @Override
    public boolean userLogout(HttpServletRequest request) {
        //判断是否登录
        User currentUser = (User) request.getSession().getAttribute(UserConstant.USER_LOGIN_STATE);
        if(currentUser==null ){
            throw new BusinessException(ErrorCode.OPERATION_ERROR," 未登录");
        }

        request.getSession().removeAttribute(UserConstant.USER_LOGIN_STATE);
        return true;
    }

    /**
     * 获得脱敏后的用户信息
     * @param user
     * @return
     */
    @Override
    public UserVO getUserVO(User user) {
        if (user==null){
            return null;
        }
        UserVO userVO = new UserVO();
        BeanUtils.copyProperties(user,userVO);
        return userVO;
    }

    /**
     * 获得脱敏后的用户信息列表
     * @param userList
     * @return
     */
    @Override
    public List<UserVO> getUserVOList(List<User> userList) {
        if(CollUtil.isEmpty(userList)){
            return new ArrayList<>();
        }
        return userList.stream()
                .map(this::getUserVO)
                .collect(Collectors.toList());
    }

    @Override
    public QueryWrapper<User> getUserQueryWrapper(UserQueryRequest userQueryRequest) {
        if (userQueryRequest == null) {
            throw new BusinessException(ErrorCode.PARAMS_ERROR, "请求参数为空");
        }
        Long id = userQueryRequest.getId();
        String userName = userQueryRequest.getUserName();
        String userAccount = userQueryRequest.getUserAccount();
        String userProfile = userQueryRequest.getUserProfile();
        String userRole = userQueryRequest.getUserRole();
        String sortField = userQueryRequest.getSortField();
        String sortOrder = userQueryRequest.getSortOrder();
        QueryWrapper<User> queryWrapper = new QueryWrapper<>();
        queryWrapper.eq(ObjUtil.isNotNull(id), "id", id);
        queryWrapper.eq(StrUtil.isNotBlank(userRole), "userRole", userRole);
        queryWrapper.like(StrUtil.isNotBlank(userAccount), "userAccount", userAccount);
        queryWrapper.like(StrUtil.isNotBlank(userName), "userName", userName);
        queryWrapper.like(StrUtil.isNotBlank(userProfile), "userProfile", userProfile);
        queryWrapper.orderBy(StrUtil.isNotEmpty(sortField), sortOrder.equals("ascend"), sortField);
        return queryWrapper;
    }
    /**
     * 判断是否是管理员
     * @param user
     * @return
     */
    @Override
    public boolean isAdmin(User user) {

        return user!=null && UserRoleEnum.ADMIN.getValue().equals(user.getUserRole());
    }
}




